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macrumors 6502
Original poster
Aug 24, 2009
(jump to last paragraph for TL; DR)

So I was reminiscing about playing Deimos Rising on an older Mac and thought I'd have a go at playing it on one of my current machines.

At first I tried to run the get the Windows version running on my B/A gaming rig, but it requires Quicktime, which I'm a little iffy about installing on Windows again given it is no longer supported and had at leas 2 security holes left open prior to being deprecated (not that I've even looked to see if I can find whatever the last version was safely).

So I went back to the Mac version, I mean my laptop should have all the horsepower the game could want given it's age (though wether it will run on a 64bit intel system is yet to be seen) but FIRST, I had to get a Stuffit Expander 'cause it was a compressed .sti file, but NOW it's a .smi

So here we are, I need to try and figure out how to convert a legacy .smi disk image mounter into something I can actually open like a .dmg BUT, all the guides I've found are really old and don't seem to apply any more, and I'd really like to play this game again, any help would be much appreciated.


macrumors 6502
Aug 10, 2014
Unfortunately, since that game was written for PowerPC Macs, it's unable to be used on any macOS version since Lion. You could try to find an emulator, but from what I've seen there aren't very many good ones out there for that. So, you could try to find a way to mount it, but you won't be able to do anything with it.


macrumors 6502a
Aug 8, 2016
If you really want to play this, game try searching for a G5 Mac.
Should Deimos Rising not run on an Intel Mac with Mac OS X 10.6.x and Rosetta installed. For example on a Mac mini 2010?
If he wants to play it on his recent rMBP he could try Mac OS X Server 10.6.x with Rosetta on Virtual Box or similar.
Another route could be Mac OS 8.6 or Mac OS 9.0.x on Sheep Shaver if it will run on any system above Yosemite.
For best performance without virtualization/emulation in a native environment you are right with the G5.
If it really comes to an old school gaming Mac, I would prefer a G4 though!
It can also run Mac OS 9 natively and not just the Classic Environment under Mac OS X 10.4.x like the G5.
.smi disk image mounter into something I can actually open like a .dmg
If you've got the fitting environment to play the game, the Self Mounting Image will mount by double clicking. No need to convert.
security holes
Every legacy system, hardware and/or software, has more security issues than recent supported systems.
If you want to play legacy games, it's just a matter how you can handle that risks.
Don't surf the web on suspect sites, just disable the network bridge in a VM, don't connect an old PC to the internet physically, don't connect it to your network, don't click Apps you don't trust, backup frequently and restore, etc.
If vulnerability is the only reason for you to not install Quicktime on your Windows gaming rig, then run it in a VM, know about the risks and act carefully.
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macrumors 6502
Original poster
Aug 24, 2009
Thanks everyone, the thought that it wouldn't run on an Intel Mac only really occurred to me somewhat as I was typing my original post, go me...

Shame it was never updated and put on the App Store like Otto Matic (both games were on the same machine I'm remembering from back in the day)

I guess my only solution would be installing quicktime on my PC, and uninstalling it, every time I want to play the game (I really can not be bothered setting up a VM, activation keys etc. ), I already am fairly careful about what I do and where I go on my PC, I don't use it for much other than gaming so I've managed to get by without any sort of antivirus/ anti malware apart form Windows defender :p
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